Londonite and Tanzanite Physical Properties

Londonite

Tanzanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.343.35

1 7.18

1.5 Fracture

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

None

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Ca₂Al₃(SiO₄)₃(OH)

Londonite and Tanzanite Chemical Formula

While comparing Londonite and Tanzanite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Londonite and Tanzanite chemical formula.

Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Londonite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.35 whereas that of Tanzanite is 3.35.